NAME ____________________________________________________ DATE __________
Ions Worksheet
Use your periodic table to fill in the missing spaces below.
Element
Atomic
Protons Electrons
Number
Group #
Valence Cation or
Electrons Anion?
Carbon
Oxygen
Potassium
Arsenic
Iodine
Calcium
Boron
Neon
For each of the following ions, indicate the total number of protons and electrons. When given
the protons and electrons, indicate the ion with the correct charge.
Ion
Protons
Electrons
Protons
Electrons
Cl1-
56
54
K1+
87
86
S2-
84
86
Sr2+
50
46
Al3+
32
36
P3-
55
54
Si4-
12
10
Ion
Use your periodic table to complete the table below. The first one has been done for you.
Element
Atomic #
Mass
Iodine
53
127
53
35
17
1
1
Hydrogen
Protons
35
5
Oxygen
Neutrons
74
Electrons
54
I1Cl1-
0
45
36
B3+
11
16
Symbol
8
10
Element
Atomic #
Mass
Protons
Neutrons
Electrons
7
7
10
Nitrogen
Aluminum
27
Symbol
10
56
26
29
24
Cu1+
35
64
29
27
Match each of the positive ions listed with the total number of electrons that ion contains. Use
your periodic table. The same answer may be used more than once.
A) 2
B) 10
C) 21
D) 23
E) 24
F) 25
G) 36
H) 48
I) 76
J) 81
____ Al+3
____ Fe+3
____ Mg+2
____ Sn+2
____ Li+1
____ Cr+3
____ Rb+1
____ Pt+2